Mileage reimbursement goes down Jan. 1 St. Thomas Newsroom December 9, 2009 The University of St. Thomas will decrease the employee mileage reimbursement of 55 cents per mile to 50 cents per mile for business use of personal vehicles. This change is in accordance with the IRS, according to the Accounts Payable Department. Employee mileage reimbursements for business use will be calculated at the decreased rate for travel on and after Jan. 1, 2010. Questions? Call Edie Dull in Accounts Payable, (651) 962-6382.